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New study finds emerging pathogen inside brown locusts

17 February 2025 | Story Andre Damons | Photo Supplied

Prof Carolina Pohl-Albertyn — Prof Carlien Pohl-Albertyn is the NRF SARChI Research Chair in Pathogenic Yeasts at the UFS.

A new study by researchers from the University of the Free State (UFS), the National Health Laboratory Service, and the University of Venda has confirmed for the first time that common brown locusts are carriers of pathogenic yeasts that can cause severe infections in humans – especially in people with compromised immune systems or who are seriously ill.

The study, ‘South African brown locusts, Locustana pardalina, hosts fluconazole resistant, Candidozyma (Candida) auris (Clade III)’, highlights for the first time the presence of the pathogenic (disease-producing) fungal yeast C. auris in the digestive tract of the locusts, and shows their potential in disseminating this emerging pathogen. The research started in April 2022, when 20 gregarious (swarming) adult locusts were collected during a large locust outbreak which occurred from September 2021 to May 2022 in the semi-arid Eastern Karoo region in the Eastern Cape. The study is still under peer review.

According to Prof Carlien Pohl-Albertyn, National Research Foundation (NRF) SARChI Research Chair in Pathogenic Yeasts, three C. auris strains were isolated from three different adult locusts, two of which also harboured strains of another potentially pathogenic yeast, Candida orthopsilosis. “The fact that we were able to isolate C. auris from 15% of the sampled locusts, using non-selective media and a non-restrictive temperature of 30°C, may indicate that C. auris is abundant in the locusts and that specific selective isolation is not mandatory,” Prof Pohl-Albertyn said.

“Interestingly, C. auris was isolated from the fore- and hindgut of the locusts. Isolation from the foregut, which is dedicated to food intake and storage, filtering and partial digestion, indicates that C. auris was probably obtained by the locusts via feeding activities. Isolation from the hindgut confirms that C. auris can survive the digestive processes in the midgut and is likely to be released back into the environment via faeces.”

Healthy humans are not at great risk

One of the C. auris strains was studied in more detail. This strain was not resistant to disinfectants but showed decreased susceptibility to the common antifungal drug fluconazole. This is a characteristic of this yeast species and thus not surprising. Most of the emerging pathogenic yeasts show this intrinsic resistance. This highlights the urgent need to discover and develop new antifungal drugs.

Prof Pohl-Albertyn, also a Professor of Microbiology in the UFS Department of Microbiology and Biochemistry, says, “Healthy humans are not at great risk for infection by this yeast and there is currently no proof that ingestion may be harmful to them. This is unfortunately not the case for people with compromised immune systems or who are seriously ill. However, few susceptible people come into direct contact with the locusts in South Africa.”

She added that there are treatment options available, using other antifungal drugs, but C. auris can become resistant to all the currently available antifungal drugs.

Importance of the study

“The fact that locusts are a food source for other animals, such as birds, could lead to eventual distribution of the yeast to people. In other countries, wild locusts are a food source for humans and there more direct transmission may be possible,” Prof Pohl-Albertyn said.

She explained that this study tries to answer questions regarding the natural hosts of this emerging pathogen and how it may facilitate the spread of the pathogen to the rest of the environment. The study is one part of the puzzle regarding how new pathogens may emerge from the environment and spread to people.

“One of the questions in the field of pathogenic yeasts is how C. auris was able to emerge as a pathogen in several different countries in a relatively short period. It is well known as a hospital-acquired pathogen, but it is not known where in the environment it occurs naturally, and which environmental factors may have shaped its evolution and ability to cause human infections. This has implications for the prevention of the spread of this specific yeast species, as well as our preparedness for new pathogenic yeasts that may be emerging from the environment.”

News Archive

A new dawn for student governance

2011-09-02

Our SRC presidents: Richard Chemaly (Bloemfontein Campus) and Bongani Ncgaca (Qwaqwa Campus)
Photo: Hannes Pieterse

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The successful and peaceful completion of the University of the Free State’s (UFS) Student Representative (SRC) elections 2011 herals a new dawn for student governance with the announcement of the results today (1 September 2011).

The SRC elections at the Qwaqwa Campus were completed on 25 August 2011, while the elections at our Bloemfontein Campus took place on 29 and 30 August 2011.

“A new dawn heralds a new day when Richard Chemaly, the son of Lebanese immigrants becomes President of an SRC, as elected by students from all racial backgrounds and from across the student body at large. A new day has arrived when candidates could have won voter support across racial lines; a new day is here when all SRC members are now recognised leaders on the basis of academic accountability,” the Dean of Student Affairs, Mr Rudi Buys, says.

A new dawn has arrived; firstly, insofar as student elections for the choice of student leaders at the UFS now proceed according to a non-racial and a non-party political basis.

Not only did the SRC elections at both the Bloemfontein and Qwaqwa Campuses achieve its required quorum, with 31% (4 729 votes) and 50% (2 112 votes) voter turnout, respectively, but the SRC elected by students at the Bloemfontein Campus is 55% black and 45% white, and 60% female and 40% male. The numbers of votes gained by successful candidates also indicate that voters from all racial backgrounds have voted for their candidates of choice.

Secondly, a new dawn has arrived insofar as student governance occupied by only some student groups claiming to speak on behalf of all students has made way for direct voting for candidates by the broad student body and the threefold increase of student governance structures on campus.

Not only did all students at our Bloemfontein and Qwaqwa Campuses (a total of 15 173 and 4 257, respectively) have the opportunity to participate in voting directly, but nine additional Student Councils were established at our Bloemfontein Campus that each holds an ex officio seat on the SRC and allows for student governance in all the major student sectors of the student body, such as for postgraduate students, international students and all categories of student associations.

The various councils now established include the Student Academic Affairs Council, the Student Associations Council, the Postgraduate Student Council, the International Student Council, the Student Media Council, the Residences Student Council, the Commuter Student Council and the Rag Community Service Fundraising and Service Councils. In addition, all faculties also introduced student representative structures at departmental and faculty level in 2011 to ensure student participation in faculty management and governance.

The SRC members at the Bloemfontein Campus are:

Elective portfolios:
President: Mr Richard Chemaly
Vice-President: Mr Lefata David Maklein
Secretary: Ms Matshepo Ramokgadi
Treasurer: Mr Werner Pretorius
Arts & Culture: Ms Alta Grobelaar
Accessibility & Student Support: Mr William Clayton
First-generation Students: Ms Petre du Plessis
Media, Marketing & Liaison: Ms Biejanka Calitz
Sport: Mr Bonolo Thebe
Student Development & Environmental Affairs: Ms Busisiwe Madikizela
Transformation: Ms Qaqamba Mhlauli

Ex officio portfolios:
Dialogue & Ex officio: Associations Student Council: Mr Anesu Ruswa
Academic Affairs & Ex officio: Academic Affairs Student Council: Mr Jean Vermaas
Residence Affairs & Ex officio: Campus Residences Student Council: Ms Mpho Mokaleng
City student Affairs & Ex officio: Commuter Student Council: Ms Annemieke Plekker
Postgraduate Affairs & Ex officio: Postgraduate Student Council: Ms Glancina Mokone
International Affairs & Ex officio: International Student Council: Mr Pitso Ramokoatsi
Student Media Affairs & Ex officio: Student Media Council: Ms Nicole Heyns
RAG Community Service & Ex officio: RAG Fundraising Council: Ms Iselma Parker
RAG Community Service & Ex officio: RAG Community Service Council: Ms Motheo Pooe

In the Qwaqwa elections, SASCO achieved 36,84% of the vote, with SADESMO, PASMA and NASMO each achieving 29,73% and 18,56% and 12,74%, respectively .

Mr Bongani Ncgaca was elected as the President of the SRC at our Qwaqwa Campus, while the names of the SRC members at the campus will be announced on 7 September 2011.

The Central SRC will be established on 8 September 2011 by a joint sitting of the two SRCs.

The successful completion of the SRC elections at the Bloemfontein Campus follows a yearlong review process of student governance by a Broad Student Transformation Forum (BSTF) that consists of 59 delegations from student organisations and residences. The BSTF adopted independent candidacy for elective portfolios and additional student councils to provide ex officio seats on the SRC as the template for student governance, following the consideration of a series of benchmarking reports on student governance nationally and internationally.

The UFS Council adopted the new SRC Constitution, as drafted and submitted by the BSTF, on 3 June 2011.

Media Release
1 September 2011
Issued by: Lacea Loader
Director: Strategic Communication
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: news@ufs.ac.za

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